div.overflow_1{
    width: 300px;
    height: 100px;
    border: 1px solid cadetblue;
    overflow: hidden;

}
div.overflow_2{
    width: 100px;
    height: 200px;
    border: 1px solid cornflowerblue;
    font-size: larger;
    overflow: auto;
}
.box{
    width: 400px;
    height: 50px;
    border: 3px solid #258b53;
    margin-top: 10px;
    background-color: blue;
}
.pos_static{
    position:static;
    background-color: chocolate;
}
.pos_relative{
    background-color: yellow;
    position: relative;
    right: 10px;
    top: 20px;
    z-index: -100;
}
.pos_fixed{
    background-color: beige;
    position: fixed;
    top:0;
    right: 0;
}
.pos_absolute{
    background-color: tomato;
    position: absolute;
    top:100px;
    right: 200px;
}
.menu:hover + .absolute_menu{
    display: block;
}
.absolute_menu{
    display: none;
    background-color: yellow;
    position: absolute;
    top: 46px;
    left: 0px;
}
.pos_sticky{
    position: sticky;
    position: -webkit-sticky;
    background-color: #258b53;
    bottom: 30px;
    margin-left: 400px;
}
.box_float{
    float:left;
    background-color: violet;
    margin-left: 20px;
}
.clf{
 clear :both;
}
li{
    float: left;
    width: 100px;
    border: 1px solid black ;
}